Quarter	US dollars
1986-09-30	23059
1986-12-31	23128
1987-03-31	26329
1987-06-30	24959
1987-09-30	25051
1987-12-31	30316
1988-03-31	29753
1988-06-30	27617
1988-09-30	26485
1988-12-31	29153
1989-03-31	26716
1989-06-30	27333
1989-09-30	28778
1989-12-31	32022
1990-03-31	34326
1990-06-30	35702
1990-09-30	39898
1990-12-31	41123
1991-03-31	37343
1991-06-30	36147
1991-09-30	39711
1991-12-31	39161
1992-03-31	37616
1992-06-30	39147
1992-09-30	57227
1992-12-31	46052
1993-03-31	52183
1993-06-30	52269
1993-09-30	51529
1993-12-31	54078
1994-03-31	50652
1994-06-30	50486
1994-09-30	54081
1994-12-31	58952
1995-03-31	70358
1995-06-30	64729
1995-09-30	67332
1995-12-31	75016
1996-03-31	71674
1996-06-30	73028
1996-09-30	81000
1996-12-31	74140
1997-03-31	73962
1997-06-30	66946
1997-09-30	63669
1997-12-31	72434
1998-03-31	70597
1998-06-30	71871
1998-09-30	88513
1998-12-31	71990